Gitaroo Man!!! Sooooooo much better than Parappa the Rapper. The songs were longer, a lot more fun, and there were a lot more of them. Plus it has a decent story, cliched as hell, but still fun. And a side note, Shadow of the Collossus, a great game, yes, but unknown? It went greatest hits, and people are still looking for copies now a days. But Godhand, that game was really only bought by 4 people. It was a buggy mess, but you get past that, and it becomes one of the best action games out there. If only Clover didn't have to force it out due to their being shut up, cause with more polish, it would've done really well I believe.
Oh, and REZ sucks, it's rare for a reason.